Lantern-pinion.



No. 787,041. PATENTED APR. 11, 1905 B. H. HORN. "a LANTERN PINION.

APPLICATION FILED 001'. 6. 190 i.

UNITED STATES Patented April 11, 1905.

PATENT OFFICE.

WVATERBURY CLOCK PORATION.

CO., OF YVATERBURY, CONNECTICUT, A COR- LANTERN-PINION.

SPECIFICATION forming part of Letters Patent No. 787,041, dated April11, 1905.

Application filed October 6, 1904.. Serial No. 227,425.

To a whom, (It nan/y concern:

Be it known that 1, ERNEST H. HORN, a citizen of the United States,residing at aterbury, in the county of New Haven and State ofConnecticut, have invented a new and useful Improvement inLantern-Pinions; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the figures of referencemarked thereon, to be a full, clear, and exact description of the same,and which saiddrawings constitute part of this specification, andrepresent, in

Figure 1, an end View of a pinion constructed in accordance with myinvention; Fig. 2, a side view of the same; Fig. 3, a vertical sectionalview on a larger scale than Figs. 1 and 2, which, it will be understood,are more than full size.

This invention relates to an improvement in lantern-pinions for use ineither clock or watch movements, but particularly for small pinions, andis an improvement on the invention set forth in Patent N 0. 444,684,granted January 13, 1891. The invention set forth in this patentcomprised a staff with two collets thereon, one of which was constructedwith a series of perforations and the other with a series ofcorresponding seats, with leaves extending through perforations of theone collet into the corresponding seats in the other collet, the leavesbeing held in place by a cap secured over the open ends of theperforations in the one collet. For economy of space the collet with theseats was formed with a shoulder to receive the wheel of the pinion.

The object of this invention is to avoid the necessity of the cap and toutilize a movementwheel as a means for holding the leaves in position;and the invention consists in the construction as hereinafter described,and particularly recited in the claim.

As shown in the drawings, I employ a staff 2, on which two collets arefixed. The collet 3 for convenience I Will specify as the outer colletand the collet 4 as the inner collet. Extending through the inner collet4 are a series of perforations 5, and in the collet 3 are a series ofcorresponding seats 6, the perforations and seats being formed bydrilling in the usual manner, as improved machinery now permits thesecollets to be drilled from the direction of the longer end of the staff.Passing through the perforations 5 and entering into the seats 6 are aseries of leaves 7, formed, as usual, from short pieces of wire. Afterthe leaves are inserted a movement wheel 8, which has a solid centralportion or hub 9, is placed over the staff and crowded against the innerface of the collet 4, the diameter of the central portion beingsufficiently large to cover the perforations in the collet, so as tohold the leaves in place. This wheel may be secured to the staff in anyof the wellknown manners, and by employing a movement-wheel as a meansfor securing the leaves in position the use of a cap for that purpose isavoided and the inner collet may be made comparatively thin, as it isunnecessary to provide a shoulder thereon for the wheel, it being onlynecessary that they should be heavy enough to hold the leaves againstlateral or endwise displacement.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a lantern-pinion, the combination with a staff, of an inner and anouter collet mounted thereon, the inner collet constructed with acircular series of perforations, and the outer collet with a series ofcorresponding seats, leaves extending through said perforations and intosaid seats, and a movement-wheel having a central portion closelyfitting said staff and located adjacent to the inner collet so as toclose the perforations therein whereby said leaves are held in place.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

ERNEST H. HORN.

\Vitnesses:

SAMUEL BUTCHER, VVILLIAM H. BASSETT.

